Use the alias method described earlier to change to account used for logging in. Your original email will still work, but you'll log in with your new alias. Don't make the alias public. That will stop the attempts.
If you're getting alerts of failure to login there is no point in changing your password as they haven't cracked your password (IMPORTANT assuming your password is complex, if not make sure you change it)
To save you looking for how to do this, I'll re-iterate
Click on "My Account"
Click on My info (the head and shoulders symbol)
scroll down, Click on Sign-in preferences bottom left in Account info pane
add an alias mail if necessary, make it primary
Then make sure you click on "change sign-in preferences" and disable the mails you don't want to be used for login, one of which will be the attempted login account.
If you're forgetful you could have have 2 aliases that may be used for sign in, I prefer one (half the risk of hackers finding the new alias)
You can still use your original email address, just not for login.
Don't make the new email alias public or use it for anything on the internet.